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The regulation of egg output by Ostertagia ostertagi in calves infected once only

Published online by Cambridge University Press:  06 April 2009

J. F. Michel
J. F. Michel
Affiliation:
Central Veterinary Laboratory, Weybridge
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Extract

Analysis of the egg counts of calves infected with one dose of larvae showed that they followed exactly the same course as those of calves infected daily, rising to a peak 25–30 days after infection and then decreasing logarithmically.

An experiment in which calves were infected on a single occasion with different numbers of worms showed that faecal egg counts were not a reflection of worm numbers but were limited by a separate mechanism. Evidence is discussed which suggests that the number of eggs present in a female worm is not an entirely satisfactory measure of its rate of ovulation.

Type
Research Article
Information
Parasitology , Volume 59 , Issue 4 , November 1969 , pp. 767 - 774
Copyright
Copyright © Cambridge University Press 1969

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References

REFERENCES

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